Emil klahn



QNo Model.)

No. 509,315. v

E. KLAHN. ESGAPEMBNT FOR TORSIONAL CLOCKS.

Patented'Nov. '21", 1893.

NITED STATES PATENT Qrmcn.

EMIL KLAHN, OF W'EST HOBOKEN, NEW JERSEY, ASSIGNOR TO DANIEL C. HOOD,.OF NEW YORK, N. Y.

ESCAPEMENT FOR TORSIONAL CLOCKS.

SPECIFICATION forming part of Letters Patent No. 509,315, dated November 21, 1893.

Application filed June 23, 1892. Serial No. 437,734. (No model.)

To aZZ whom it may concern.-

Be it known that I, EMIL KLAHN, a citizen of the United States, and a resident of WVest Hoboken, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Escapements for Torsional Pendulum Clocks, of which the following is a specification.

My invention has reference to improvements in escapements for torsion pendulum clocks, and the invention consists of an escapement by means of which a regular working of the clock movement is obtained.

My improved escapement is illustrated in the accompanying drawings, which represent the escape wheel with anchor or escape-lever, the latter being shown in difierent positions in Figures 1 and 2.

Similar letters of reference indicate corresponding parts.

It is a fact that a torsion pendulum is considered as a better means to obtain a regular working of the clock than the common swinging or ball pendulums,but the torsion pendulums, which heretofore have been in use, did not answer fully their purpose, as the imperfection of the escapements did not secure the exact working of the movements, so that the overplus of the torsion of the pendulums could not be compensated in a satisfactory manner. By my invention an escapement is created which will remove these objections so that, after the movement and the pendulum have once been regulated, an exact and correct working of the clock is secured.

My improved escapement for torsion pendulum clocks consists of the common serrated escape wheel A and the anchor or escape-lever B which has the usual palletarms a and b with the rest-pallets a and I) respectively, the rest-pallet a being the lower side of the pallet arm a and the rest-pallet b the upper side of the pallet-arm I), while the faces a and b form the lifting pallets. The palletarms are engaged by the escape wheel in the usual manner. The spring of the torsion pendulum, by which the weight of the same is suspended, is set in motion by a fork or clamp connected with the anchor 13 in the well known manner, so that by the swinging action of the anchor due oscillation is imparted to the spring and the pendulum is kept in a continuous torsion alternately to the right and left hand side. This well known mechanism is not shown in the drawings. When in the common escapement one tooth of the escape-wheel passes over the respective lifting pallet of one pallet arm of the anchor, another tooth of the wheel touches the restpallet of the other pallet arm. By the passage of the respective tooth over the corresponding lifting pallet the anchor is swung to one side and thereby an impulse imparted to the spring of the pendulum to make a partial rotary motion by means of the above described mechanism connecting the anchor with the pendulum spring.

To secure a correct working of the clockmovement it is necessary that the oscillation of the pendulum-weight and the torsion of the spring are performed simultaneously, which is impossible in the torsion pendulum clocks with the common escapements now in use, as the spring, once set in motion by the fork and the escape-lever, will make its backward torsion before the weight, attached to the spring, can begin its oscillation in the same direction. This lack of uniformity in the motions of the spring and the weight of the pendulum produces very often an incorrectness in the working of the clock-movement, and the object of my invention is to remove this disadvantage. For this purpose I have the jaws of the escape anchor provided with projections c which extend over the lifting pallets, as shown in the drawings. By these projections the teeth of the escape wheel are retained for a moment, after they have passed over thelifting pallets and thereby the swinging motion has been imparted to the anchor, by which motion the impulse for the torsion is given to the spring of the pendulum. The corresponding tooth of the escapement-wheel is arrested by the respective projection as long as it is required that by the torsion of the pendulum the anchor removes the said projection over the tooth and the wheel is disengaged from the anchor, while the said tooth rests on the corresponding resting pallet. From this resting pallet the tooth will not move before the pendulum has made its entire torsion and swings back in the opposite direction, when the action of the anchor with its other pallet-arm and projection will be repeated in the described manner. The spring is thus kept in its tension until the Weight in its torsion has reached the dead point, as the projections of the pallet arms of the anchor will not allow the anchor to leave the escape wheel until the weight and the spring of the pendulum together can begin their reversed torsion at the same moment, so thatan entire equal motion of both the spring and weight of the pendulum and thereby a regular and exact working of the clock movement are secured.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent- The combination of a serrated escape-wheel with an anchor having at the ends of its pallet-arms projections extending over the lifting pallets of the same, substantially as and for the purpose set forth.

Signed at New York, in the county of New York and State of New York, this 20th day of June, A. D. 1892.

EMIL KLAIIN.

Witnesses:

CHARLES KARE, ERNEST Terran. 

